Distance from wireless router too close??

I have a WRT54GX4 and access from anywhere in my house or outside is not a problem....except when my laptop is on the same desk and about 18 inches away. I have a tough time acquiring a signal, and when I do, I usually lose it.

Is there such a thing as being too close to the router? The only things nearby are my desktop monitor, a corded phone, desktop PC's speakers, printer, and a joystick.

The problem is easily solved by using a cable, but I would prefer not if I could change something.